+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   437235 (2012 XB20) Classification: Main-belt Asteroid          SPK-ID: 2437235 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1234439247130223 5.8544e-08   a 2.792870874046346 5.2986e-08 au q 2.448107932137376 1.8003e-07 au i 7.790403710889096 7.7112e-06 deg node 253.8162163499166 5.7216e-05 deg peri 45.29574111699121 6.9719e-05 deg M 57.58068946275182 4.1249e-05 deg tp 2459123.822645239824 (2020-Oct-01.32264524) 0.00019212 TDB period 1704.80500719194 4.67 4.8515e-05 1.328e-07 d yr n .2111678452851168 6.0094e-09 deg/d Q 3.137633815955316 5.9527e-08 au   Orbit Determination Parameters    # obs. used (total)      128      data-arc span      4643 days (12.71 yr)      first obs. used      2007-10-11      last obs. used      2020-06-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56089      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 14:25:53   Additional Information  Earth MOID = 1.43928 au   Jupiter MOID = 2.05205 au   T_jup = 3.304  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.51   n/a E2021B25   437235 (2012 XB20)          Discovered 2007-Oct-11 by Spacewatch at Kitt Peak Reference: Last Updated: 2015-06-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-27 10:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin